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Afternoon

A bunch of us have being chatting about mixes to use on some upcoming 70/75 meter stuff, I am thinking 35/70 but someone raised an interesting idea, how about air as the travel mix...

Some Points
Use to 50 meters - short time on helium
Easy to get 230 bar and cheap
Bale out if needed from 60/70m range.
Run times only changed by one minute.

 

[Mark Chase]

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<font color='#000F22'>Surley it just depends on your personal narcosis limit?

If you can handle air at 60m ok but some people I know would be off with the mermaids.

Personaly coming up from 75 I would want to be fulley in control so I would go for the He.

I also beleived that the Helium is more quickley absorbed but equaly more quickley dispersed than Nitrogen. Some of JJ's stuff reeds that he dosent necessarely agree that He increases deco at all.

From 75m first stop depth is 39m by my planner so I would opt for 35/45 switch at second stop 36m then a switch to 50% at 21 and 100% at 6m

Just over 82% on the CNS clock and your PP is above 1 for all but the 9m stop where it will be .96%

Ok its three stages but it keeps deco under an hour for a 20min bottom time.